Accuracy of high-order CFD and overset interpolation in finite volume/difference codes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

High order accurate inviscid flux discretization schemes have been used for many years in the context of block structured CFD solvers. In order to address complex and moving geometries, many of these solvers incorporate overset composite grid techniques. The vast majority employ variants of Lagrangian interpolation to determine overset donor weights and, of these, most use 2nd order accurate interpolation stencils. This paper demonstrates the pitfalls of using lower-order (i.e. 2nd) overset interpolation strategies in conjunction with high-order solver numerics. Simple theory and familiar canonical problems are used to demonstrate that in certain types of problems failure to use high-order interpolation can quickly lead to errors that undermine the reasons for using an advanced numerical scheme in first place, namely accuracy. Results also include calculations of a complex geometry with overset grids in relative motion, and their comparison to test data. Cases using standard and high order overset interpolation show the value of advanced interpolation schemes. Two computer codes are used: OVERFLOW 2.2, and a high order code developed at Penn State.

Original languageEnglish (US)
Title of host publication22nd AIAA Computational Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103667
StatePublished - Jan 1 2015
Event22nd AIAA Computational Fluid Dynamics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name22nd AIAA Computational Fluid Dynamics Conference

Other

Other22nd AIAA Computational Fluid Dynamics Conference, 2015
CountryUnited States
CityDallas
Period6/22/156/26/15

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All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Foster, N. F. (2015). Accuracy of high-order CFD and overset interpolation in finite volume/difference codes. In 22nd AIAA Computational Fluid Dynamics Conference (22nd AIAA Computational Fluid Dynamics Conference). American Institute of Aeronautics and Astronautics Inc, AIAA.